RSI's: and now for the really bad news.
RSI - Repetitive Strain Injury. Lots of us have them. My Patellofemoral Pain Syndrome would fit the bill. It's a highly technical term for "You have pain in the front of the knee and we don't have any idea what causes it."
Worse still, orthos, chiros and physios don't seem to know how to fix it.
The research is actually a little disturbing. RSI's are commonly thought to involve inflammation. That's not terribly daunting. Just ease up a couple of weeks, pop some NSAID's, etc.
But the research I've seen of late suggests something other than inflammation and something more akin to a dry rot. And the specific term that had a chilling effect:
Almost has the ring of "It ain't necessarily coming back" to it. Sounds like a rupture or tear in the offing for the trainee who can't rein in the competitive instincts.